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Hamamatsu Corp. - Earth Innovations LB 2/24

Photodetector IDs Individual Vortex Beams

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CAMBRIDGE, Mass., Jan. 9, 2013 — A new device that simply adds a metallic pattern to the window of a commercially available, low-cost photodetector could contribute to a major increase in the rate of future optical communications. Developed by applied physicists at Harvard School of Engineering and Applied Sciences (SEAS), the device enables a conventional optical detector, which would normally measure only light’s intensity, to pick up on a vortex beam’s rotation. Twisted light waves, also called optical vortices or vortex beams, rotate as they travel and have gained new attention for transmitting more...Read full article

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    Published: January 2013
    Glossary
    holography
    Holography is a technique used to capture and reconstruct three-dimensional images using the principles of interference and diffraction of light. Unlike conventional photography, which records only the intensity of light, holography records both the intensity and phase information of light waves scattered from an object. This allows the faithful reproduction of the object's three-dimensional structure, including its depth, shape, and texture. The process of holography typically involves the...
    optical communications
    The transmission and reception of information by optical devices and sensors.
    photodetector
    A photodetector, also known as a photosensor or photodiode, is a device that detects and converts light into an electrical signal. Photodetectors are widely used in various applications, ranging from simple light sensing to more complex tasks such as imaging and communication. Key features and principles of photodetectors include: Light sensing: The primary function of a photodetector is to sense or detect light. When photons (particles of light) strike the active area of the photodetector,...
    wavelength division multiplexing
    A system that allows the transmission of more than one signal over a common path, by assigning each signal a different frequency band. Also known as frequency division multiplexing.
    AmericasCommunicationsdata transmissionFederico CapassoHarvard School of Engineering and Applied SciencesHarvard SEASholographyImagingindustrialinterference patternJiao LinMikhail A. Katsoptical bandwidthoptical communicationsoptical vortexOpticsPatrice GenevetphotodetectorResearch & TechnologySensors & Detectorsspatial division multiplexingvortex beamwavelength division multiplexingWDM

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